Valentine's Day is a celebration of love and romance — and a great opportunity for marketers to create publicity for their brands. CNBC takes a look at some of the weird and wonderful Valentine's campaigns capitalizing on the festival.

The $1.28 engagement ring

British discount store Poundland has grabbed headlines with its range of engagement rings for just £1 ($1.28). Shoppers can choose from a red heart, a blue "marquise" or clear "stones" set in silver or gold colored bands — and if things go badly, the store is offering a full refund up to a year from purchase.